Results 161 to 170 of about 19,051 (188)

Determination of masked mycotoxins using HPLC–tandem mass spectrometry

, 2006
Franz Berthiller, Rainer Schuhmacher, Brigitte Poppenberger, Doris Lucyshyn, Marc Lemmens, Gerhard Adam, Rudolf Krska   +6 more
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Masked Mycotoxins and Mycotoxin Derivatives in Food: The Hidden Menace

2009
Conjugated or masked mycotoxins first came to attention in the mid-1980s, mainly from clinical observations on animals affected by mycotoxicoses fed with apparently low-level mycotoxin-contaminated feed. The unexpected toxicity was attributed to the presence of conjugated forms of mycotoxins, possibly generated by the plant metabolism, which were ...
Stefano Sforza, Arnaldo Dossena, Gianni Galaverna, Rosangela Marchelli, Chiara Dall'Asta   +4 more
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Chapter 1. Introduction to Masked Mycotoxins

2015
Mycotoxins are toxic, secondary metabolites of moulds. They are produced by filamentous fungi on almost every agricultural commodity worldwide. After the infection of crop plants, mycotoxins are modified by plant enzymes and often conjugated to more polar substances, like sugars.
Berthiller F., Maragos C. M., Dall'Asta C.   +2 more
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Sterigmatocystin-a Masked Potent Carcinogenic Mycotoxin

Journal of Toxicology: Toxin Reviews, 1983
AbstractSterigmatocystin (stg), a related compound of aflatoxin B1 (af B1) is a secondary metabolite of a wide variety of fungi species.Stg is a compound in which a substituted anthraquinone is fused to the bisdihydrofuran ring. An unsaturated 2, 3 bond in the bis-dihydrofuran ring is closely related to the biological activities of stg.
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Zearalenone-16-O-glucoside: A New Masked Mycotoxin

Journal of Agricultural and Food Chemistry, 2014
This paper reports the identification of a barley UDP-glucosyltransferase, HvUGT14077, which is able to convert the estrogenic Fusarium mycotoxin zearalenone into a near-equimolar mixture of the known masked mycotoxin zearalenone-14-O-β-glucoside and a new glucose conjugate, zearalenone-16-O-β-glucoside. Biocatalytical production using engineered yeast
Elisabeth Varga, Maria Paula Kovalsky Paris, Rudolf Krska, Franz Berthiller, Gerhard Adam, Wolfgang Schweiger, Gary J. Muehlbauer, Romana Stückler, Christian Hametner   +8 more
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Hyphenated chromatographic techniques for structural characterization and determination of masked mycotoxins

Journal of Chromatography A, 2012
Mycotoxins are secondary metabolites produced by fungi that can contaminate a wide range of food and feed commodities and that are harmful to humans for their poisonous and toxic effects. An increasing amount of data have been accumulated in the last years, showing that mycotoxins may also occur in modified forms originating by plant, fungi or animal ...
CIRLINI, Martina, DALL'ASTA, Chiara, GALAVERNA, Gianni   +2 more
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Cleavage of Zearalenone‐Glycoside, a “Masked” Mycotoxin, during Digestion in Swine

Journal of Veterinary Medicine, Series B, 1990
SummaryComparative analyses of cereal samples pretreated with or without β‐glucosidase indicate the presence of zearalenone‐glycoside. To examine the stability of zearalenone‐glycoside during digestion, mixed feed was artificially contaminated with synthesized zearalenone‐4‐β‐D‐glucopyranoside (395 μg/kg) and fed to a pig over a period of 14 days.
G. Plank, Brigitte Gedek, Joachim Thiem, Manfred Gareis, Johann Bauer, S. Grabley   +5 more
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Masked Mycotoxins Are Efficiently Hydrolyzed by Human Colonic Microbiota Releasing Their Aglycones

Chemical Research in Toxicology, 2013
Fusarium mycotoxins are secondary metabolites produced by Fusarium spp. in cereals. Among them, deoxynivalenol (DON) and zearalenone (ZEN) are widespread worldwide contaminants of cereal commodities and are ranked as the most important chronic dietary risk factors.
Dall'Erta A., Cirlini M., Dall'Asta M., Del Rio D., Galaverna G., Dall'Asta C.   +5 more
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A systematic review of plant-conjugated masked mycotoxins: Occurrence, toxicology, and metabolism

Critical Reviews in Food Science and Nutrition, 2019
Masked mycotoxins are biologically modified phase II metabolites formed by plant defense mechanisms through glucosylation catalyzed by uridine diphosphate -glucosyltransferases. Most of the current reports focus on the occurrence of masked mycotoxins in Europe, America, Africa, and cover other geographic regions, e.g. China and Japan.
Zhiqi Zhang, Dongxia Nie, Kai Fan, Junhua Yang, Wenbo Guo, Jiajia Meng, Zhihui Zhao, Zheng Han   +7 more
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Foodborne mycotoxicoses, risk assessment and underestimated hazard of masked mycotoxins and joint mycotoxin effects or interaction

Environmental Toxicology and Pharmacology, 2015
The existing hazard of joint mycotoxin exposure of animals/humans and the significance of masked mycotoxins in foods or feeds and their respective contributions to the development of some food born mycotoxicoses is briefly reviewed. The importance of joint mycotoxin interaction in the complex etiology of some foodborn mycotoxicoses is covered in depth.
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